AN1005: IPM6220A System Electronics Regulator for Mobile Applications Introduction

IPM6220A System Electronics Regulator for
Mobile Applications Introduction
TM
Application Note
Introduction
The IPM6220A is a highly integrated power management IC
that provides regulation and protection for five system
voltages required in high-performance notebook PCs. The IC
integrates two step-down fixed frequency PWM controllers,
one step-up PWM controller and two linear regulators and
operates from a battery input of 5.6–24VDC. All MOSFET
drivers, output voltage and current monitoring and protection
circuitry is included in a single 24-lead SSOP package.
The IPM6220A and the evaluation board reference design
provide a flexible, efficient, cost effective and compact
solution for laptop computers and other portable
equipments. Using the output ON/OFF controls: SDWNALL,
SDWN1 (+5V), and SDWN2 (+3.3V), various low power
states can be enabled for increased battery life and run time.
State of health information is provided with the ‘PGOOD’,
open drain output, which when pulled high indicates that all
outputs (except the +12V) are within ±10% of their nominal
output levels and that the +12V is within its overvoltage and
undervoltage thresholds.
Quick Start Evaluation
Circuit Setup
The IPM6220EVAL board is built for easy evaluation using
standard laboratory equipment. Consult Table 1 for the
range of input and output voltages and currents.
Set up switch SW1 and jumper, JP1
The IPM6220EVAL board is typically shipped with the
jumper installed and SW1 set with all outputs enabled.
JP1 enables the red/green LED to indicate the state of
PGOOD. A green lignt indicates PGOOD is asserted.
Remove JP1 only if efficiency measurements are being
taken, especially at light loads.
1
March 2002
AN1005
SW1 controls the enabling of the outputs. Figure 1 and Table
2 describe the enabling options.
Connect the Input Power Supply
With the input power supply turned off, connect it to the V IN
and GND turrets on the top of the board.
Connect the Output Loads
Connect electronic or other loads to the outputs +5V, +3.3V,
+12V, 3.3V always and 5V always, as required.
Operation
Apply Power to the Board
With the input power supply adjusted between 5.6V and 24V,
turn the power supply on. The green, PGOOD, LED should
illuminate. If the red LED is on, cycle the ‘SDWNALL’ switch
down, then up.
Examine Start-up Waveforms
The enabled switcher outputs should come up according to
their soft start capacitor values. The ramp up time for the
outputs may be observed on the test points provided, as
well as the ramp up time on the soft-start / enable pins,
SDWN1 and SDWN2. Typical start-up waveforms are
shown in Figure 2.
With the 3.3V and 5V outputs enabled, the green LED will
illuminate when both outputs are within 12% of their nominal
value. If one, or both, of these outputs are disabled, the LED
will be red, indicating the output(s) is not withing 12% of the
nominal. The 12V boost converter may be ‘artificially’ shut
down without affecting the LED. This is done with SW1,
SDWN3, in the ‘up’ position, connecting the 5V ALWAYS to
the feedback pin, VSEN3.
Figure 7 shows a schematic diagram of the IPM6220
Evaluation board.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Application Note AN1005
TABLE 1. EVALUATION BOARD INPUT / OUTPUTS
MIN
VOLTAGE
PARAMETER
TYP
VOLTAGE
MAX
VOLTAGE
MIN
CURRENT
TYP
CURRENT
MAX
CURRENT
Vin
5.6
12
24
(1)
(1)
(1)
+5V
4.9
5.0
5.1
0
3
5
+3.3V
3.234
3.3
3.366
0
3
5
+12V
11.76
-2.0%
12
set @ 9-15
12.24
+2.0%
0
100mA
200mA
4.9
5.0
5.1
0
10mA
50mA (2)
3.234
3.3
3.366
0
10mA
50mA (2)
+5V Always
+3.3V Always
NOTES:
1. Dependent on Vin and output loading
2. Maximum combined currents of +5V Always and +3.3V Always is 50mA
Figure 1 shows the switch position definition of switch, SW1.
SDWN3 (12V)
SDWN2 (3.3V)
SDWN1 (5V)
SDWNALL
5V SDWN1
5V OUT
FIGURE 1. SWITCH S1 POSITION DEFINITIONS
Table 2 shows the function of each of the switch positions.
3.3V SDWN2
3.3V OUT
TABLE 2. SWITCH S1 FUNCTIONS
SWITCH POS
SW UP/DOWN
FUNCTION
SDWNALL
UP
Enables all other SW
positions
SDWNALL
DOWN
All outputs shutdown
SDWN1 (+5V)
UP
SDWN1 (+5V)
DOWN
SDWN2 (+3.3V)
UP
SDWN2 (+3.3V)
DOWN
SDWN3 (+12V)
UP
SDWN2 (+12V)
DOWN
+5V shutdown
+5V on
+3.3V shutdown
+3.3V on
+12V shutdown
+12V on
FIGURE 2. OUTPUT VOLTAGES AND SOFT-START. 2V/DIV,
5ms/DIV, C16 = C17 = 0.022uF
IPM6220A Reference Design(s)
Evaluation Board Circuit Description
The basic circuits on the evaluation board are:
• two buck converters with synchronous rectifiers (+5V and
+3.3V outputs)
• a boost converter (+12V output)
• two internal linear regulators (+3.3 always and +5.0
always)
• soft-start, shutdown and status (PGOOD)
Table 3 shows optional component configurations for various
output currents. The Eval1 board is normally configured for
5A outputs.
During the initial start-up, the capacitances on the five output
voltages must be charged. Depending on the input power
impedance and how fast it transistions, much of this required
energy may come from the input capacitor, C4. Therefore,
2
Application Note AN1005
one constraint on the soft-start time is that it should be
longer than the input voltage transistion otherwise, during
start up, the input capacitor voltage may ‘sag’ causing an
input undervoltage shutdown. Practically, this is only a
concern when using a bench power supply which may take
more than 50ms to reach its voltage set point.
TABLE 3. TYPICAL COMPONENTS FOR VARIOUS OUTPUT CURRENTS
COMPONENT
REF DESIG
2A
3A
4A
5A
MOSFETS
Q2,Q3,Q4,Q5
HUF76105SK8
HUF76112SK8
HUF76112SK8
HUF76112SK8
INPUT
CAPACITOR
C4,INPUT
CAPACITOR
N/A
N/A
1) SANYO
25SP56M
1) SANYO
25SP56M
1)TAIYO YUDEN,
TMK325F106ZH
1)TAIYO YUDEN,
TMK325F106ZH
1)TAIYO YUDEN,
TMK325F106ZH
INPUT
CAPACITORS
INDUCTOR
3.3V OUTPUT
CAPACITORS
C6, C10 INPUT 1)TAIYO YUDEN,
CAPACITORS TMK325F106ZH
1) TOKO 892NBS-220M 1) TOKO 892NAS-150M
2) COILCRAFT
2) COILCRAFT
DO3316P-153
DO3316P-223
15uH
22uH
L1,L2
1) PANASONIC ETQP6F102HFA
2) ABC TAIWAN
ELECTRONICS
SS1208100MSB
1) PANASONIC ETQP6F102HFA
2) ABC TAIWAN
ELECTRONICS
C13,C22
1) C22 ONLY
SANYO 4TPC150M
1) SANYO
4TPC150M
1) SANYO
4TPC150M
1) SANYO
6TPB330MM
C21,C32
1) C32 ONLY
SANYO 6TPB150M
1) C32 AND C21 ONLY
SANYO
6TPB150M
1) C32 AND C21 ONLY
SANYO
6TPB150M
1) C32 AND C21 ONLY
SANYO
6TPB330M
5V OUTPUT
CAPS
Efficiency curves for the 5V and 3.3V outputs, up to 5A, are
shown in Figures 3 and 4. Figure 5 shows typical regulation
performance for the 12V boost output.
on the schematic but not all are populated on the Eval1
board. This is done to allow flexibility for customers to
evaluate the design with their preferred parts.
Figure 6 shows the out-of-phase switching waveforms for
the 3.3V and 5V outputs. Also shown is the resulting inductor
current waveforms for output currents of 5A.
Table 4 lists the bill of materials for the evaluation board.
The schematic diagram in Figure 7 shows the complete
schematic implemented on the Eval1 board. Various optional
components such as input and output capacitors are shown
3
The evaluation design is implemented in a 2-ounce, 4-layer
printed circuit board. The board and the individual layers are
shown on the last pages of the applications note. Wherever
needed to reduce layout parasitics, via-in-pad (VIP) layout
techniques were used.
Application Note AN1005
3 .3 V OF F , 5V EF F IC IEN Y vs LIN E A N D LOA D
7.2V
10.8V
12.6V
5V OF F , 3 .3 V EF F I C I EN C Y vs LIN E A N D LOA D
14.4V
7.2V
100.00%
100.00%
95.00%
95.00%
90.00%
90.00%
85.00%
85.00%
80.00%
80.00%
75.00%
75.00%
70.00%
70.00%
65.00%
65.00%
60.00%
60.00%
55.00%
55.00%
50.00%
50.00%
45.00%
45.00%
40.00%
0.001
0.010
0.100
1.000
10.000
10.8V
12.6V
14.4V
40.00%
0.001
0.010
OU T PU T C U R R EN T , A
0.100
1.000
OU T P UT C UR RE N T , A
FIGURE 3. 5V EFFICIENCY
FIGURE 4. 3.3V EFFICIENCY
CH1: 3.3V INDUCTOR
CURRENT, 2A/DIV
12V BOOST LOAD REGULATION, PERCENT
2.500%
2.000%
CH2: 3.3V PHASE
VOLTAGE,
10V/DIV
1.500%
% REGULATION
1.000%
CH1, CH2>
0.500%
CH3: 5V INDUCTOR
CURRENT, 2A/DIV
5V SW
0.000%
-0.500%
CH4: 5V PHASE
VOLTAGE,
10V/DIV
-1.000%
CH3, CH4>
-1.500%
-2.000%
-2.500%
0.000
1µs/DIV
0.050
0.100
0.150
0.200
0.250
LOAD CURRENT
FIGURE 5. 12V REGULATION
4
FIGURE 6. SWITCHING WAVEFORMS, OUT OF PHASE
OPERATION
10.000
2
1
C14
1.0uF
10V
C13
330u
+ 6.3V
+5_ALWAYS
R8
5R1
L1
10.2uH
2
1
HUF76112SK8
Q4
C6
1.0uF
50V
Q2
GND
Components
HUF76112SK8
C5
1800pF
50V
3.3V PHASE
C22
330u
+ 6.3V
3.3V OUTPUT
C1 +
100uF
10V
C2
+ 10u
25V
Notes :
* - Optional Not Installed
PGOOD
+3.3V
GND
+5.0 ALWAYS
1
2
R20
97K6
1%
4
RED
2
4
2
1
1
1
RED
1
=
R1
680R
2
1
1
R5
1
GREEN
12
11
10
9
8
7
6
5
4
3
1
SDWN2
2
2
1
C3
1.0uF
50V
0.022uF
16V
C16
IPM6220
PGOOD
SDWN2
VSEN2
ISEN2
PGND2
LGATE2
5V-ALWAYS
PHASE2
UGATE2
BOOT2
3.3V ALWAYS
VBATT
U1
1
2
+
GND
VSEN3
GATE3
SDWN1
VSEN1
PGND1
LGATE1
ISEN1
PHASE1
UGATE1
BOOT1
+
R4
SDWNALL
C4
56u
25V
*
R6 5R1
C17
0.022uF
16V
R3
1
4
Q5
4
Q3
680R
1
1
Q6
4
Vin
+5_ALWAYS
S1
KAL2104ER
HUF76112SK8
2
L3
6.8u
L4
2.7uH
C11
1800pF
50V
R7
5R1
L2
10.2uH
1
C23 *
6800pF
50V
2
D3
MBRS130LT3
2
1
Coilcraft DT3316P-682
C10
1.0uF
50V
5V PHASE
HUF76112SK8
2
HUF76112SK8
R12 5R1
1.0uF
16V
C34
C40
10uF
25V
C9
0.15uF 16V
1
2
2
1
2
C39
10uF
25V
R9 200
2
1
2
C38
10uF
25V 1
SDWN1 SDWNALL
1
0.0
C12
1
D2
BAT54WT1
2
C37
10uF
25V 1
R19 2K
2
1
2
680R
13
14
15
16
17
18
19
20
21
22
23
24
C26
56u
25V
2
1
FIGURE 7. IPM6220 EVALUATION BOARD, REV_C
Q1
BSS123LT1
2
1.0uF
16V
C35
*
5R1
C8
1.0uF
10V
R11 2K
2
1
CR1
LXA3025IGC-TR
R2
680R
GREEN
1
JUMPER
JP1
2
2
+5_ALWAYS
C15
0.0
R10 200
C7
0.15uF 16V
2
1
D1
BAT54WT1
1
0.0
1
2
R16
1
2
2
1
3
1
2
GND
1
2
1
2
8
7
6
5
3
2
1
8
7
6
5
3
2
1
5
6
7
8
1
2
3
5
6
7
8
1
1
1
2
3
3
5R1
R15
*
+
+
1
2
1
2
+
1
+
C36
22u
6.3V
R14
97K6
1%
C21
330u
6.3V
R13
24K9
1%
C20
1.0uF
50V
C19
0.0
6.3V
5V OUTPUT
1
2
+3.3 ALWAY S
2
1
2
4
3
2
5
6
7
8
1
2
3
1
2
2
1
2
1
2
3
8
7
6
5
1
2
3
4
+
C24
47u
16V
C32
330u
6.3V
2
1
1
2
C25
1.0uF
50V
C18
1.0uF
10V
1
5
2
Vin
+
C33
47u
16V
+12V
GND
+5V
GND
+Vin
Application Note AN1005
Application Note AN1005
TABLE 4. EVALUATION BOARD BILL OF MATERIALS
Item
Qty
Reference
Value
Part Number
1
1
CR1
LXA3025IGC-TR
2
1
C1
100uF
KEMET T494D686(1)016AS
3
1
C2
10u
4
5
C3, C6, C10, C20, C25
5
1
6
Voltage
Package
SMT/3MM/2.3MM
10V
SM/CT_7343_12
AVXTPSC106K025RO500
25
SM/CT_6032_12
1.0uF
KEMET C1812C105K5RAC
50V
C4
56u
OSCON 25SP56M
25V
2
C5, C11
1800pF
KEMET C0805C102K5RAC
50V
SM/C_0805
7
2
C9, C7
0.15uF
KEMET C1206C154K4RAC
16V
SM/C_1206
8
3
C8, C14, C18
1.0yF
KEMET C1206C105K8RAC
10V
SM/C_1206
9
0
C15, C12
100p
KEMET C0805c101k5GAC
10
4
C13, C21, C22, C32
330u
AVX6TPB330M
6.3V
SM/CT_7343_12
11
2
C17, C16
0.022uF
KEMET C1206C223K4RAC
16V
SM/C_1206
12
1
C19
0
AVX6TPB330M
6.3V
SM/CT_7343_12
13
1
C23
6800pF
KEMET C1206C68K5GAC
50V
SM/C_1206
14
2
C24, C33
47u
KEMET T494D76(1)016AS
16V
SM/CT_7343_12
15
2
C35, C34
1.0uF
KEMET C0805C105K4RAC
16V
SM/C_0805
16
1
C36
22u
6APA22M
6.3V
SM/CT_7343_12
17
2
D2, D1
BAT54WT1
Motorola BAT54WT1
SM/SOT23_123
18
1
D3
MBRS130LT3
Motorola MBRS130LT3
SM/_SMB
19
1
JP1
JUMPER
20
15
TP1, TP2, TP3, TP4, TP7,
J1, J2, J3, J4, J5, J6, J7,
J8, J9, J10
1502TL-2
Keystone 1502TL-2
21
2
L1, L2
10.2uH
Panasonic ETQP6F102HFA
HP/IND_SMT_ETQP6
22
1
L3
6.8u
Coilcraft DT3316P-682
HP/IND_SMT_DT3316SR
23
1
L4
2.7uH
API Delvan DN2530
AX/.300S.100/.028
24
1
Q1
BSS123LT1
SM/SOT23_123
25
5
Q2, Q3, Q4, Q5, Q6
HUF76112SK8
SOG.050/8/WG.244/L.200
26
4
R1, R2, R3, R4
680R
0805
SM/R_0805
27
3
R5, R6, R12
5R1
00805
SM/R_0805
28
3
R7, R8, R15
5R1
1206
SM/R_1206
29
2
R9, R10
200
0805
SM/R_0805
30
2
R11, R19
2K
0805
SM/R_0805
31
1
R13
24K9
0805
SM/R_0805
32
2
R14, R20
97K6
0805
SM/R_0805
33
1
R16
0
0805
SM/R_0805
34
1
S1
KAL2104ER
E-Switch KAL2104ER
35
1
TP5
3.3V PHASE
TP\PROBE-SOCKET
36
1
TP6
5V PHASE
TP\PROBE-SOCKET
37
1
TP8
3.3V OUTPUT
TP\PROBE-SOCKET
38
1
TP9
5V OUTPUT
TP\PROBE-SOCKET
39
1
U1
IPM6220
SSOP_24P
6
SM/C_1812
SM/C_0805
Application Note AN1005
FIGURE 8. SILKSCREEN
FIGURE 9. TOP
7
Application Note AN1005
FIGURE 10. INTERNAL LAYER 1, GND
FIGURE 11. INTERNAL LAYER 2, POWER
8
Application Note AN1005
FIGURE 12. BOTTOM, GND
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